Being able to dig through so many cards to find the right piece can mean that you are never far away from being able to answer the board, giving you time to assemble whatever combo you happen to have drawn into
Not to mention that a creature can't have lower power than itself, because its power is always, well, equal to its power
What makes this whole thing really absurd though, is that you when you cast an Equipment spell like that, it gains When this Equipment enters the battlefield, attach it to target creature you control. That means that all you have to do is cast an Equipment from the top of your deck, and suddenly youve bolstered your attack and defence substantially
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Put the rest on the bottom in a random order.) Sorcery Rousing Refrain Add for each card in target opponent's hand
In a world so dominated by creatures and EtBs, this is very, very strong